Saw-filing machine.



0. C. PENDLETN.

lSAW FILING MACHINE (Application filed Jan. 19, 1899.i (No Model.) 2 Sheets-Shut I.

No. 645,5I4, Patented Mar. I3, |900.

Patented Mar. I3, |900.

No. 645,5I4.

o. c. PENDLETUN. SAW FILING MACHINE. (Application Hled Jan. 19, 1899.)

2 Sheets-Sheet 2.

(No Model.)

WITNESSES:

vATTORNEY TH: rignms veris co.. PN0To-L|TNo.. wAsHmum, o, c.

N rrnn STATES Fries.,

PATENT SAW-FILING MACHINE.

SPECIFICATION forming part of Letters Patent N o. 645,514, dated March 13, 1900. `Application.tiled Iauary 19,1899. Serial No. 702,645. (No model.)

To @ZZ whom i may concern: j

Be it known that I, OLIVER C. PENDLETON, a citizen of the United States of America, and a resident of the city of New York, borough of Brooklyn, county of Kings, and State of New York, have invented certain newandk useful Improvements in Saw-Filing Machines, (Case A,) of which the following is a specification.

Myinvention relates to saw-filing machines of the type in which one or more rotary tiles are rotated in contact with the teeth of the saw; and it consists of certain improvements in such machines whereby the same may be conveniently mounted upon the bed-plate of a band-saw machine for operating on said band-saw and whereby one tile or set of files can be used on saws of varying numbers of teeth to the inch and such adjustments made without removing any of the parts of the machine. Furthermore, these said adj ustments may be made to adapt the machine to each particular saw when the saw is being introduced to the machine.

It also consists of the combination, with such saw-tiling mechanism or its equivalent,

of a saw-setting attachment operated by the same driving mechanism which actuates the saw-tiling apparatus, so that the tiling and settin g of the saw can be done simultaneously.

The preferred form of apparatus for carrying out my invention is illustrated in the accompanying two sheets of drawings, in which;-

Figure 1 is a side elevation of `my machine with va portion of the band-saw and band-saw table shown in conjunction therewith. Fig. 2 is an enlarged detail of Fig. 1, showing the method of adjusting the saw-feeding apparatus. Fig. 3 is a detail plan view of Fig. 1.

Fig. 4 is a detail bottom view showing the saw-setting apparatus. Fig. 5 is a vertical central detail section showing the adjustable mounting for the saw-setting levers.

Throughout the drawings like referencefigures refer to like parts.

Upon the bed plate or table 1 of the bandsaw machine (not shown) yis clamped the frame 2 of the filing and setting mechanism by means of one or more bolts and nuts 2n.

'In the mainframe 2 is journaled the vertical shaft 3, on which is keyed or otherwise fixed a bevel-gear 4, meshing with a bevel-gear 5, mounted on and rotated 'with the drivingshaft 6, which is rotated by the crank 7 or maintained in position by a similar mandrel 12 below it, which latter mandrel :is keyed or fastened by a set-screw to the shaft 3, so as to revolve therewith. Any number of washers maybe introduced between the mandrels 12 and 11 to adjust the distance between them, or other means for securing this result may be employed. On the mandrel 11 is the circular Iile 13, forming an arc of about fivesixths of the circumference of acircle, and on the mandrel 12 is a similar file 14.` The upper mandrel 11 has a cut-away or iiattened portion 15, whose surface is a plane passing through the chord of the arc of the file 13. The smoothfaced guide-stri p 16, of similar cross-section to the file 13, is pivoted at one end 17 to the mandrel, so that that end of the guide-strip abuts against the end of the file 13. The inclination of the guide-strip 16 to the le 13 may' be varied by turning it about this pivotal point 17 and clamping itto the mandrel in such different positions. The preferred clamping apparatus shown consists of the slot 18 in a projection on the strip 16 and set-screw coperating therewith. The free end 16xL of the guidestrip 16 and the coperating end 13a of the file are beveled to corresponding angles, so that they will in a measure overhang each other. The tiles 13 and 14 are both made tapering longitudinally, the end 13 of the iile 13 being smaller and the cross-section gradually increasing throughout the length of the tile, the difference between the two ends b eving about one thirty-second of an inch in the average file. Asimilar taper in the opposite direction is given to the file 14, so that the smaller end of each iile always en ters the teeth IOO upper and lower pivotal points, the upper pivotal point being shown at 2l in Fig. 3. This swinging frame is held in position by the thumb-screws 22 22a. The saw-blade is held up to the file by the grooved back guide 23, mounted on the carriage 24, which slides in guides on the extension-piece and is held to said piece 25 by bolts or pins 26 and adjusted thereon by the feed-screw 27, set by the hand-wheel 23.

On the lower end of the rotating shaft 3 are the two cams 29 and 29a, which are located between the two levers and 31, which are normally held in engagement .with the cams by the double spring 32 or equivalent device. These levers are called the saw-setting7 levers, and they are pivoted together, so as to form practically a pair of pincers on a pivoted pin 33. This pivoted pin 33 is held in position by reason of the fact that its head 33 slides in the recessed groove 2b on the main frame. (See Fig. 5.)

On the pivot-pin is a sleeve 34, whose exterior surface is threaded, and this sleeve is held on the pin 33 by the nut 37. The setting-lever 3l is journaled on this sleeve 34 by the correspondiUgly-threaded journal-bean ing 35, which is pressed into a perforation in said lever. The saw-setting lever 30 is mounted on the adjustable journal formed by the eXternally-grooved thimble 36, which is adjustable on the screw-threaded sleeve 34. In the ends of the saw-setting levers 30 31 are adjustable screws 30 and 31a or similar adj ustable projections.

The mode of operation of my invention is as follows: The swinging guide-frame 2O being thrown out, as shown in dotted lines in Fig. 3, and the grooved back guide 23 being withdrawn by turning the hand-wheel 28,the f rame 2 is adjusted upon the bed-plate 1 in such a position as to bring` the band-saw 19 in position for being filed. The adjustable back guide 23 is then forced forward by turning the handwheel 28 in the opposite direction until the saw-teeth come into engagement with the files, as shown in Fig. 1. The swinging guide-frame 2O is then thrown back into the position shown in full lines in Fig. 3 and clamped there by means ofthe thumb-screws 22 and 22a. The mandrels 11 and 12 are then adjusted to the proper distance to hold the tiles in exact engagement with the proper teeth of the saw by any convenient means not specifically shown in the drawings, as by the introduction of washers or by turning set-nuts. The tiles are then slowly rotated and the adjustable guidestrip 16 clamped at just the rightinclination to feed the saw two teeth at each revolution.

The iile 14 may have a guide-strip similar toV that shown at 16, the same being hidden from View in Fig. 1, or the one guide-strip may serve all the purposes of feeding the saw. A continued rotation of the driving-shaft 6 then files the saw, the file 13 operating on the even teeth and 14 upon the odd teeth. The tapering tiles take a light cut at iirst, but continue increasing said cut as the larger end of the tile is approached, thus equalizing the work throughout the entire length of the le. The guide-strip 16 lifts the saw, and on account of the beveling of the ends 16 and 13 the saw is delivered to the other end of the tile before it is entirely released by the guide strip. lVhile the circular tiles are operating on the saw and holding the saw-blade stationary, the cams 29 and 29a force the rear end of the levers 30 and 31 apart and cause the adjustable screws 30 and 31 in the other end of said levers to approach. These levers arc so adj usted on theiradj ustable pivot-bearings that said adjustable projections 30 and 31 will go against the sides of two adjacent sawteeth, as shown in Fig. 1, andbend them to the right and left a predetermined distance,

thus giving said teeth their proper set This operation having been` performed, the cams 29 29a release the tail ends of thelevers 30 31 and the spring 32 brings them together, thus opening the pair of pincers formed by the levers 30 and 3l, leaving the saw free to be fed forward by the guide-strip 16 in position for two other teeth to be tiled and two other teeth to be set. The setting-levers 30 and 31 can be adjusted at the proper distance apart in the line of their common pivot 33, so as to abut against the teeth of different saws by loosening the nut 37 and turning the threaded sleeve 34 or the grooved j ournal-n ut 36, or both. At the same time the throw of the setting-levers may be varied by shifting said pivot-pin in and out along the groove 2b or by adjusting the screws 30 and 31n or by both methods of procedure. Vhen the proper adjustment is secured, the nut 37 is set up hard against the end ot` the sleeve 34 and the parts are made rigid. The lever 30 then vibrates on its screw-threaded bearing on the sleeve 34, the journal-bearing 35 having been forced into the eye of the lever and held there by frictional contact. The bearing-nut 36 for the lever 30 is mounted loosely enough in said lever to be turned therein by hand, but still has enough frictional contact with it to oscillate back and forth with said lever and not shift its position on the screw-threaded sleeve 34.

The advantages of my invention consist in the fact that it has arigid,but easily-adj usted, bearing upon the bed-plate of the machine and the fact that one file or one set of files can be used for different saws of any pitch,

that the feeding device may be adj usted with-- out removing any parts and adjusted to each particular sawwithout the necessity of making nice measurements, and in the fact that a simple saw-setting device capable of exact adjustment is provided which may be used in combination with the saw-filing apparatus to file and set the saw at one operation. The

tapering tiles distribute the work evenly throughout the entire revolution of the apparatus, thereby avoiding shocks and a tendency to bend instead of tile the saw-teeth,

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and the two tiles rotating in opposite directions each files the tooth in the direction in which it is bent by the setting apparatus, thereby avoiding any danger of binding th teeth against the file.

It is evident that various changes could be made in the details of the apparatus herein described and illustrated without departing from the spirit and scope of vmy invention. Other mechanical elements could be substituted for those shown which would produce the same motions and have the same funetions. A less or a greater number of files might be employed, &c. but all these modifications I consider within the scope of my invention.

Having therefore described my invention,y what I claim as new, and desire to protect by Letters Patent, is-

1. In a saw-filing machine, the combination of a cylindrical iile-holder, a spiral tile mounted thereon, said file tapering longitudinally, means for feeding a saw-blade in a line parallel to the axis of the file-holder, and means for rotating said file-holder in a direction such that the smaller end of the iile iirst engages the saw.

2. In a saw-filing machine a curved file tapering longitudinally, combined with means for rotating said file in such direction that the smaller endof the' iile will first engage the saw-tooth, and an adjustable pivoted guidesection between the ends of the file and completing with it one revolution of a spiral, substantially as described.

3. In a saw-filing machine the combination of a curved file forming part of the circumference of a circle, and an adjustable guidesection forming the remainder of said circumference, the free end of said guide-section and the adjacent end of the file being correspondingly beveled, substantially as described.

4. In a saw-filing machine the combination of the mandrel, the curved file thereon, bent into the arc of a circle, the uninclosed arc of the mandrel circumference being cut away on the plane of thepchord of said arc, a guidesection pivoted at oneend to abut against one end of the file, and means for clamping the guide-section in different positions along the flattened surface of the mandrel so as to produce varying degrees of inclination to the plane of the file, substantially as described.

5. In a saw-filing machine theeombination of the mandrel, the curved iile thereon bent into the arc of a circle, the uninclosed arc of the mandrel circumference being cut away on the plane of the chord of said arc, a guide-section pivoted at one end to abut against one end of the iile, and a slotted extension to 'the guide-section and a set-screw for clamping the guide-section in different positions along the iiattened surface of the mandrel so as to produce varying degrees of inclination to the plane of the le, substantially as described.

6. In a saw-filing machine the combination of one or more rotating les, a shaft which rotates one of said files, cams on said shaft, and a pair of oppositely-acting levers actuated by said cams to set the teeth of the saw while being led, together with pivot-bearings for said levers adjustable toward and away from the cam-shaft, substantially as described.

7. In a saw-filing machine the combination of one or more rotating les, a shaft which rotates one of said les, cams on said shaft, and

a pair of oppositely-acting levers actuated by said cams to set the teeth of the saw while being filed, together with attachments to saidv levers adjustable toward and from each other whereby the amount cf set given the saw-teeth may be varied, substantially as described.

8.V In a saw-setting mechanism the combination of the guide for the saw-blade, the rotating cani-shaft, and the oppositely-acting levers operated thereby arranged to press ad jacent saw-teeth in opposite directions, together with a pivot for said levers adjustable toward and away from said cam-shaft. v

9. In a saw-setting mechanism the combination of the guide for thesaw-blade, the rotating cam-shaft, and the oppositely-aeting levers operated thereby arranged to press adjacent saw-teeth in opposite directions, together with the pivot-pin adjustable toward and away from said camshaft and the journal-bearings for said levers adjustable lengthwise of said pivot-pin, substantially as described.

' 10. In a saw-setting mechanism the combi- .nation of the guide for the saw-blade, the rotating vcam-shaft, and the oppositely-acting levers operated thereby arranged to press adjacent saw-teeth in opposite directions, together with the adjustable pivot-pin for said levers, the external]y-screW-threaded sleeve for said pivot-pin, the threaded j ournal-bearing thereon of one of the levers, and the adj ustable nut on said sleeve which forms the journal for the other lever, substantially as described.

Signed by me at New York city, New York, this 4th day of January, 1899.v

, OLIVER C. PENDLE'TON.

Witnesses:

LILIAN FOSTER, J. E. PEARsoN.

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